HONG KONG SECTION OF GUANGZHOU-SHENZHEN-HONG KONG EXPRESS ...

Tunnel - Wikipedia

A major tunnel project must start with a comprehensive investigation of ground conditions by collecting samples from boreholes and by other geophysical techniques. An informed choice can then be made of machinery and methods for excavation and ground support, which will reduce the risk of encountering unforeseen ground conditions.

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ISRM

In the ISRM website you will find information about the activities of the society as well as information and services useful to the rock mechanics practitioners, such as a conference directory, ISRM publications, discussion forums and a virtual library.

Excavation tools - Herrenknecht AG

Efficient and reliable provision of all kinds of tools. When advising our customers in choosing the right excavation tools and replacement times appropriate for the expected geology, we fall back on our wealth of experience.

New Austrian Tunneling Method (NATM)

New Austrian Tunneling Method (NATM) The New Austrian Tunneling method (NATM) was developed between 1957 and 1965 in Austria. It was given its name in Salzburg in 1962 to distinguish it from old Austrian tunnelling approach.

The Gilgel Gibe Hydropower Project in Ethiopia ...

Tunnel boring machine - Wikipedia

The first successful tunnelling shield was developed by Sir Marc Isambard Brunel to excavate the Thames Tunnel in 1825. However, this was only the invention of the shield concept and did not involve the construction of a complete tunnel boring machine, the digging still having to be accomplished by the then standard excavation methods.

Tunnelling Journal - the leading magazine and website for the ...

Tunnel Update - February 2018 - Tunnel Business Magazine

Three times per year, TBM: Tunnel Business Magazine recaps the status of major tunneling projects underway in the United States and Canada. Below is the Tunnel Update that appeared in the February 2018 issue of the print edition.

How tunnel is made - material, history, used, machine ...

a sufficient distance. In other cases, the NATM is used to create a preliminary lining as the TBM progresses. Especially in cases where two TBMs dig toward each other from opposite ends of a tunnel, it may be too difficult or expensive to remove them when the digging is completed. As it n